Hydrostor Inc. through its partnership with Australian developer Energy Estate (“A-CAES NSW Pty”), and McDermott International (“McDermott”) have entered into an agreement to advance Front-end Engineering and Design studies for the 200MW Silver City Energy Storage Centre (“Silver City”) using Hydrostor's Advanced Compressed Air Energy Storage (“A-CAES”) solution. Once constructed, Silver City will be one of the world's largest renewable mini-grids, available to support Australia's National Electricity Market with dispatchable energy services and unlock renewable energy in the region that is currently being constrained by network capacity limitations.